LibreOffice / OpenOffice (LO/OO) Calc from the keyboard

LibreOffice / OpenOffice (LO/OO) Calc from the keyboard

Some people use keyboard commands instead of a computer mouse or other pointing device because they cannot, or have difficulty seeing the screen. Other people use keyboard commands, at least some of the time because the find it faster
and more convenient, especially experienced touch typists who would break their rythm by taking a hand off the keys.
LibreOffice or OpenOffice Calc has comprehensive sets of keyboard commands although finding out what they all are is not easy, or was not untill now.